Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method

Abstract

The invention relates to the technical field of tunnel and underground engineering construction, in particular to a shield knife replacing diaphragm wall reinforcing structure and a reinforcing construction method. The shield knife replacing diaphragm wall reinforcing structure includes a diaphragm wall arranged on a shield excavation route. The diaphragm wall is a plain concrete diaphragm wall. The diaphragm wall is disposed at the length portion position of knife replacement after the tunneling of a shield tunneling machine; by arranging the reinforcing structure on the shield excavation route in advance, knife replacement is performed when the shield excavation is performed to the reinforcing structure; due to the arrangement of the reinforcing structure, normal pressure knife replacement can be performed on a knife, so that the shield knife replacing diaphragm wall reinforcing structure has the advantages of being simple, convenient, fast and low in cost and the like during normalpressure knife replacement; at the same time, after the reinforcing structure is arranged, the problems of excavation face collapse and ground subsidence and the like during knife replacement are solved, the surrounding along the line of a tunnel is ensured, and quality safety accidents are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of tunnel and underground engineering construction, in particular to a reinforcement structure and a reinforcement construction method for a ground connecting wall of a shield tunnel tool changer. Background technique [0002] At present, with the continuous development of my country's infrastructure facilities, urban subways have also developed rapidly, and most of the urban subway tunnels use shield machines for tunneling construction. However, when the shield passes through the formation for a long distance or there are sandy pebbles and other high-wear formations, the wear of the shield cutter will be very serious, so the cutter has to be replaced in a planned way. At present, the commonly used methods of shield machine tool change are normal pressure tool change and pressure tool change. [0003] Although the normal pressure tool change method is simple and fast, the applicable geological range is limi...

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Problems solved by technology

[0004] Purpose of the present invention: When the formation conditions in the prior art are not suitable for directly opening the warehouse for normal pressure tool change, the tool change method with pressure has many procedures, high cost, high requirements for operators and high risk, and it is easy to cause ground damage. To solve the problem of quality and safety accidents caused by subsidence, a reinforcement structure and reinforcement construction method for the ground connection wall of the shield tunneling tool change are provided. By setting the reinforcement structure on the shield tunneling route in advance, the tool can be replaced when the shield tunneling reaches the reinforcement structure. , due to the arrangement of the reinforcement structure, the tool can be changed at normal pressure, which has the advantages of simple, quick and low cost of the normal pressure tool change. At the same time, after the reinforcement structure is arranged, there will be no excavation during the tool replacement process Surface subsidence, ground subsidence and other problems, ensure the surrounding environment along the tunnel, and effectively avoid the occurrence of quality and safety accidents

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